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Please use this identifier to cite or link to this item: https://rinacional.tecnm.mx/jspui/handle/TecNM/4135
Title: Diseño de Observadores Adaptables para Sistemas LPV. Aplicación al Control Tolerante a Fallas.
Authors: Perez Estrada, Abraham Jashiel%551033
metadata.dc.subject.other: Observateurs adaptatifs, observateurs dynamiques, entrées inconnues, perturbations, systèmes LPV, commande à tolérance de pannes.
Issue Date: 2020-01-10
Publisher: Tecnológico Nacional de México
metadata.dc.publisher.tecnm: Centro Nacional de Investigación y Desarrollo Tecnológico
Description: In this thesis, the observer design for linear parameter-varying systems and their applications to fault diagnosis and fault-tolerant control is studied. A linear parameter-varying (LPV) system can approximate the nonlinear dynamic behavior through a set of linear state space models that are interpolated by a mechanism depending on the scheduling variables. The observer used in this research is called generalized dynamic observer (GDO), where the principal idea is to add dynamics structure to increase its degrees of freedom, with the purpose of achieving steady-state accuracy and improve robustness in estimation error against disturbances and parametric uncertainties. Therefore, this structure can be considered as more general than a proportional observer and proportional-integral observer. It addresses the GDO synthesis for LPV systems with measured and unmeasured scheduling variables such as the quasi-LPV system, in which the scheduling variables are functions of endogenous signals such as states, inputs, or outputs instead of exogenous signals. Conditions of existence and stability for each GDO structure are given through the Lyapunov approach using parameterindependent Lyapunov function or parameter-dependent Lyapunov function. The design is obtained in terms of a set of linear matrix inequalities. Engineering applications are used to illustrates the performance and effectiveness of the proposed approaches. It considers a fault-tolerant control (FTC) strategy for polytopic LPV systems to maintain the current system close to the desired performance and preserve stability conditions in the presence of actuator faults. A fault diagnosis unit is built to estimate the states, the actuator faults, and the parameter variation. This information is essential to the FTC law.
metadata.dc.type: info:eu-repo/semantics/doctoralThesis
Appears in Collections:Tesis de Doctorado en Ingeniería Electrónica

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